Market Field School provides for pupils aged four to 16 years with autistic spectrum disorder. This is severe for a minority of pupils, accompanied by complex learning difficulties and challenging behaviour. The majority of pupils have moderate learning difficulties, while others have severe learning difficulties. A very few pupils have disabilities such as visual impairment, hearing impairment, physical disabilities and additional medical conditions, including mental health difficulties. All pupils have statements of special educational needs. The school has significantly more boys on roll than girls. The school is organised into four discrete sections: Key Stage 1, (which includes children who attend full time in Reception and Years 1 and 2 pupils) where there is a focus on the early years curriculum; Key Stage 2 with a topic programme; Key Stage 3 with secondary subjects; and Key Stage 4 with a wide range of secondary-based examination subjects, alongside a life-skills programme and work experience. Each key stage has enhanced provision for pupils with autistic spectrum disorder. An above average proportion of pupils receive the pupil premium, the additional government funding for those eligible for free school meals or those who are looked after by their local authority. Most pupils are from White British backgrounds and none are from families who speak English as an additional language. The school does not make use of alternative provision. The school is in a temporary building while it waits for the completion of a new building. A new purpose built special school is due to open in September 2015.